So what it is asking you to do is compare the amount of oats to the other ingredients. ex, 2 cups of oats for every 0.5 cup of quinoa. just do that for the rest of them
The equation of a line which has the slope m and passes through the point A(x1,y1) has the formula: y-y1=m(x-x1) in your case m= -5 ; A(x1;y1)=(1;-1) y-(-1)= -5(x-1) y+1= -5(x-1) answer is c